Huge stone faces: monumental sculptures carved into mountains

Mount Rushmore is a monumental granite rock carving in South Dakota. It
depicts four US presidents: George Washington, Thomas Jefferson, Theodore
Roosevelt, and Abraham Lincoln. Each face is 60 feet (18 metres) high, and
the width of the whole sulpture is 400 feet (122 metres). It was started in
1927 and finished in 1941. Gutzon Borglum and 400 workers sculpted the four
heads by blasting aways huge chunks of the mountain with dynamite